Blades for roofer&#39;s slag scraper



1951 M. CONFORTO 2,565,841

BLADES FOR ROOFVERS SLAG SCRAPER Filed June 17, 1947 2 Sheds-Sheet 1 as) F I vl7z19enf0r- Mic/Md 6070710,

Aug. 28, 1951 CONFORTO 2,565,841

BLADES FOR ROOFERS SLAG SCRAPER Filed June 1'7, 1947 2 Sheets-Sheet 2 Inventor Mac/1666 Cog oliq Patented Aug. 28, 1951 UNITED STATES PATENT OFFICE 3 Claims.

My invention relates to new and useful blades for roofers slag scrapers and has for one of its objects to provide specially constructed scraping blades for use in connection with the machine disclosed in my copending application Serial No. 719,391, filed December 31, 1946.

Another object of the invention is to provide blades in combination with and interchangeably connected to a shield of unique construction.

Another object of the invention is to provide blades having serrated forward or working edges. Another object of the invention is to construct blades of the kind mentioned in which the teeth are in different locations on the blade lip with -their working edges in substantially the same horizontal plane.

Another object of this invention is to provide a blade especially adapted for use in hot weather in which there are two sets of teeth, one set to the rear of the other and both sets projecting from the blade lip and terminating in the same horizontal plane. ,Another object of the invention is toprovide a blade particularly adapted for use" on roofing muck in which the teeth are arranged in angular p'ositionson the blade lip and all projecting downwardly and terminating in substantially the same horizontal plane.

Another object of this invention is to provide blades arranged in pairs to produce a plow-like scraper, the blades of the pair being reversible and interchangeable with each other to relocate the worn surfaces and thereby increasing the life thereof.

A further object of the present invention is to provide a shield which functions somewhat like a scoop to move debris forwardly and to prevent, to some extent,.particles of old roofing materials from entering the machine mechanism.

A still further object of this invention is to provide the shield with a stop or shoulder on the bottom wall against which the rear edge of a blade is to abut to maintain the blade in proper position.

With the above and other objects in view' this invention consists of the details of construction and combination of elements hereinafter set forth and then designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same I will describe its construction in detail referring by numerals to the accompanying drawings forming a part hereof, in which:

Fig; 1' is a side elevation of the roofers slag scraper with a portion of the cover broken away and illustrating one form of blade and the shield mounted thereon.

Fig. 2 is a longitudinal sectional view of the slide mechanism with the shield and another form of blade connected therewith.

Fig. 3 is an enlarged perspective view of the hot weather blade.

Fig. 4 is an end or side edge View of the same.

Fig. 5 is a perspective view on a reduced scale of the adjustable arm and the shield and one form of blade mounted thereon.

Fig. 6 is a section on the line 6--6 of Fig. 5.

Fig. '7 is a top plan View of the shield.

Fig. 8 is an enlarged top plan view of a modified blade.

Fig. 9 is an end or side edge view thereof.

Fig. 10' is a perspective view of a modified form of blade and support'structure.

Fig. 11 is a faceview of one of the blades used in the structure of Fig. 10.

In carrying out my invention as herein embodied I5 represents-the roofers slag scraper described in my copending application Serial No. 719,391, filed December 31, 19 .6, and embodying, in general, a chassis I6 mounted on wheels l1 and supporting a motor it which drives a crank 19 to reciprocate the hollow piston 20 through the medium of the connecting rod 2|. The piston is slidably mounted in the cylinder 22'also supported by the chassis and a blade supporting arm 23 is mounted on said piston and projects forwardly beyond the front end thereof. Said blade supporting arm moves in and out of the cylinder to a limited extent and imparts a reciprocating motion to any blade attached to said blade supporting arm. In order to protect the sliding surfaces of the cylinder and piston from dirt, dust and debris, a dust hood 24 of bellows formation is attached to the forward end of the cylinder 22 and to the blade supporting arm 23 in order to close the end of the cylinder and permit unrestricted movements of the blade supporting arm. The main working parts which are mounted on the chassis may be enclosed by a cover 25. A handle 26 is attached to the chassis for moving the ma chine about as desired.

The outer end of the blade supporting arm 23 is fashioned to provide a downwardly and outwardly projecting angular leg 21 with a series of teeth 28 on its outer longitudinal face. A holder 29 of' T-shape includes a shank 3!] which is adjustably mounted on the leg 21 and has a series of teeth 3| on its under side for cooperation with the teeth 28 which take the thrust when the scraping actions are in progress. Said shank 30 has a longitudinal slot 32 for the reception of a fastening device 33, such as a bolt and nut, that is situated in a fixed location on the angular leg 21. In addition to the shank 30, said holder includes the head 34 which may be straight and at right angles to the shank 30, as plainly shown in Fig. or it may be of triangular formation as illustrated in Fig. 10.

A shield 35, Figs. 1, 2, 5, 6 and 7 is scoop shape and includes a bottom wall 36, a back 31 and sides 38 terminating at the forward edge of the bottom wall. The back 3'! is curved upwardly and inwardly to bafiie any material that might have a tendency to pile up and fall over the top edge of said back. The bottom wall 36 has a transverse slit adjacent the forward edge and the areas of the bottom wall on both sides of said slit, at least contiguous said slit, are in different planes to provide a shoulder 39, Figs. 5 and '7, facing in the same direction as the forward edge of the shield. This shield 35 is removably mounted on the holder 29 by fastening devices 40, such as bolts, projected through holes 4| in the rear portion of the bottom wall 36 and into the head portion of said holder. Additional fastening devices 42, such as bolts are also projected through holes 43 in the bottom wall of the shield, ahead of the shoulder 39, and into the head of the holder 29 for a purpose to be presently described.

In Figs. 1 and 5 I have shown a flat, straight edged blade 44 for general use and this blade has notches 45 in the rear edge to register with the fastening devices 42 and pass beneath the heads thereof when said fastening devices are loosened. The notches are deep enough to permit the blade to be slipped back until the rear edge engages the shoulder 39 thus properly locating the blade relative to the other parts of the blade supporting elements and providing a stop to prevent sliding of the blade during scraping operations. This flat blade can be inverted from time to time as the front edge wears away. The width of the blade is such that it will project into the shield between the sides of the latter.

Another type of blade 46 is illustrated in Figs. 2, 3 and 4 which is generally known as a hot weather blade because it is especially adapted for use in hot weather when the slag or other roofing material may be soft. The blade 46 is fashioned to provide a flange 41 with notches '48 in the rear edge for registration with the fastening devices 42 on the blade holder, a downwardly and slightly forwardly projecting angular upper body portion 49, a forwardly and slightly downwardly projecting angular lower body portion 59 and an outwardly and downwardly projecting lip 5| having a serrated forward edge. The serrations are, preferably, in two sets, the outer ones 52 being formed by partially cutting out sections of the lip and bending said sections down to produce the second set of serrations 53 with the lower, working or cutting edges of both sets in substantially the same horizontal plane, as depicted in Fig. 4. The formations of the body portions at obtuse angles to one another and to the lip produces a highly resilient blade which is very effective in tearing up slag roofing materials and the serrations being staggered and one set behind the other small strips of the roofing materials are alternately torn away and the loosening of the first sections then assists or makes easier the subsequent removal of adjacent sections.

A type of blade 54, known as a muck blade is illustrated in Figs. 8 and 9 which is also produced from a single piece of flat metal fashioned to provide a flange 55 having notches 56 in the rear edge for registration with the fastening devices 42 on the blade holder, a downwardly and slightly forwardly projecting angular upper body portion 51, a forwardly and slightly downwardly projecting angular lower portion 58 and an outwardly and downwardly projecting lip 59 having a serrated forward edge. The serrations are in two groups, each group receding from the center towards the side similar to a spear head, as shown in Fig. 8, and each group is composed of two sets of serrations with the center one common to the identical sets of both groups. The lip 59 has alternate sections partially cut out and bent down leaving sections which comprise the central serration 60 and the spaced serrations 6i and 62 on one side and similarly spaced serrations Bla and 62a on the other side of said central one. These serrations form those of one set in both groups and the ones other than said central one are bent downwardly so that their bottom or working edges are all in one substantially horizontal plane. The sections of the lip which are partially out out and bent down from the other set of teeth of both groups and are designated 63 and B4, and 63a. and 64a, respectively. The secondary serrations 63, 63a, 64 and 64a have their bottom or working edges situated in the same plane as the primary serrations.

From the foregoing it will be apparent that the serrations are in staggered relation to adjacent ones as well as being grouped in receding angles and by this arrangement mucky or soft and deteriorated roofing materials can be more readily scraped up without sticking to the blade.

In Figs. 10 and 11 I have shown a further modification in which the head 34 of the blade holder 29 has beveled canted surfaces to which the canted, vertically curved shield 65 is secured by the fastening devices 66. This shield includes two. panels 61 and 68 which may be made as an integral unit or as separate elements. The shield panels being mounted on the faces of the blade holder the lower edges of said panels provide shoulders against which the upper edges of the blades 69 and '10 will engage said shoulders when removably mounted on the blade holder by the fastening devices II.

The blades each comprise a rhomboid shaped plate with notches 12 in its upper edge to register with the fastening devices H which are mounted on the head of the blade holder below the shield. The forward ends of the blades cooperate and because of the angular formation of said forward ends a plow-like apparatus is produced which Will open up a crevice in the roofing material and then lift the material on both sides of the opening. The blades 69and Hi can be changed by inverting each one and interchanging their positions. This is done to vary the wear on the working edges.

Of course I do not wish to be limited to the exact details of construction herein shown and described as these may be varied within the scope of the appended claims without departing from the spirit of my invention.

Havin described my invention what I claim as new and useful is:

l. A blade for a roofers slag scraper comprising a flange having notches in the rear longitudinal edge, an angular downwardly and slightly forwardly projecting upper body portion extending from the flange. and angular forwardly and 5 slightly downwardly projecting lower portion extending from the upper body portion, a lip projecting forwardly and downwardly from said 10wer body portion, the front edge of said lip extending angularly in opposite directions rearwardly from the center, and two sets of serrations on said lip, one set being along each angular edge and the other set to the rear thereof in parallelism with the first set, the serrations of the two sets being in staggered relation and the working edges of all serrations being in the same horizontal plane.

2. A blade of the kind described including a sheet metal body having a lip formed therefrom at an angle thereto, and a plurality of serrations formed from said lip in difierent angular planes with their forward edges in substantially the same horizontal plane.

3. A blade of the kind described comprising a sheet of metal fashioned to provide a flange having notches in its rear edge for registration with fastening devices on a blade holder, an angular downwardly and slightly forwardly proiecting upper body portion extending from the flange, an angular forwardly and slightly downwardly projecting lower body portion extending from the upper body portion, a lip projecting forwardly and downwardly from said lower body portion, and serrations projecting from the lip in staggered relation with the working edges all in the same horizontal plane.

MICHAEL CONFORTO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 288,812 Howland Nov, 20, 1883 2,062,908 Jepsen Dec. 1, 1936 2,084,589 Odgers June 22, 1937 2,245,544 Miller June 10, 1941 2,279,454 Fisher Apr. 14, 1942 

